Study on Finite Element Method of Stress Field in Aluminum Alloy High-Speed Milling Process

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Zhang, Wei^1 ; Li, Shunming^2 ; Wu, Qijun^1 ; An, Zenghui^2

China Ship Development and Design Center, Wuhan, China^1

College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics, Nanjing, China^2

关键词: Cutting process;    Cutting speed;    Dynamic changes;    High speed milling;    Milling process;    Stress field;    Stress state;    Three-dimensional numerical simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012088/pdf
DOI  :  10.1088/1757-899X/269/1/012088

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Three-dimensional numerical simulation model has been built by means of Advantage FEM. Perform simulation the stress fields of 7050-T7451 aluminum alloy in high speed milling process at the speed range of 628 m/min∼5946 m/min. The dynamic change and speed's influence of stress fields and residual stress in machined layer is systematically analyzed. Some conclusions were drawn. With the cutting process development, the stress field converts to the stress state that crushing stress occupies a leading position. The magnitudes of crushing stress in all directions reduce with milling processes as the effect of Thermal-Mechanical-Coupled weakens; With the cutting speed increasing the magnitudes of crushing stress in all directions fluctuate near -950Mpa first, and then increase at the speed of 3000m/min; The residual pulling stress beneath the surface 0.03mm has been found and the magnitude increases with the cutting speed. A good agreement was obtained between predictions and experiments.